Well I’ve made reference to this gun before as my “LAW” or my coaxial air cannon; I figured I might as well post it.It was never finished, meeting an untimely demise at the hands of gravity (it fell of the loading bench well I was doing some test fires last week.), but here are some of the original pictures and the guns specs:

The piston was made out of hot glue, works great, and the sealing face is sheet rubber labeled as “gasket material”. The muzzle end has a built in coupler and the plan was to modify that and a short piece of pipe so that the barrel could easily be extended for longer ranges.Originally it had a 0-100psi gauge on it but I upgraded it to a 0-150psi gauge. Later on I added a ball valve safety, and some decals.When I get around to fixing it I’ll paint on the decals and put a brass plate on the butt-stock with the make and model on it.

And here she is:

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the cannon in all it glory

me and the cannon again

I would put something smart here, but you wouldn't get it

me getting ready to light up a tank, or I would if there was a tank down range and the cannon was loaded...

Aw, friggin crap. My bad, I was thinkin combustion. Thats what I get for jumping from forum to forum. Well. I guess you could always put little sparklies behind the potato and it'd kinda give you a muzzle flash-ish kinda type thing...